Reinforced-concrete pile.



s. F. BURBANK.

REINFORCED CONCRETE PILE.

APPLICATION FILED APR. 8, 1910.

Patented Feb. 7, 1911.

witwaooeo nron.

STEPHEN FRONTIS BURBANK, OF HONOLULU, TERRITORY OF HAWAII.

REIN FORCED-CON CRETE PILE.

Specification of Letters Patent.

Patented Feb. '7, 1911.

Application filed April 8 1910. Serial No. 554,145.

To all whom it may concemfl Be it known that I, STEPHEN FRONTIS BUnBANK, a citizen of the United States, resid ng at Honolulu, Hawaii, have invented 'certain new and useful Improvements in Reinforced-Concrete.Piles; and I do hereby declare the following to be a full, clear, and

' exact descriptionof the invention, such as will enable others-skilled inthe-art to which it appertains to make and use the same.

My invention relates to rein-forced concrete piles, and has for its; object to produce a pile which will be cheaper and more efficient than those heretofore proposed.

To these ends the invention consists in the novel details of construction, and combinations of parts, all as more fully hereinafter disclosed. and particularly pointed out in the claim. v

Referring to the accompanying drawings forming a part of this specification, in which like numerals refer to like parts in all of the views :Figure 1 is a cross sectional view of a mold and a pile made in accordance with my invention; Fig. 2 is a view illustrating the mold when in its flattened out condition;

Fig. .3 is aview of a block or former on which the reinforced rings maybe wound one at a time; Fig dis a diagrammatic viewillustrating the reinforcing structure suspended as it would be in the mold cavity;'

Fig. 5 is an elevational view of the com pleted-pile, and Fig; 6 is a cross sectional View of the same. a

1 indicates the concrete material, out of which the pile is made; 2 longitudinal rods embedded in the same; and 3 a center rod or pipe passing through fthecenter of then p1le.

4 indicates a plurality of rings preferably made of a single piece of wire, and pro vided with the eyes 5 and the radial portions 6. These rings may be suitably formed one at a time on a board 7 provided with pins 8 of the size of the rods 2; and in order to make said rings one end 9 .of the wire is secured to one pin 8, and then passedto and around the succeeding pins 8 to form the eyes 5 and the circle, as shown. After the wire returns to the originalpin 8, it is then passed to the center pm, and out to the, circumference of the circle one or more times to form the radial portions 6, aftergwhich the reinforcing rings are completcd and may be removed from the board 7 and suspended, as by the piece 10,'in the mold cavity from any convenient portionef the mold,.as the link 11.

As diagrammatically illustrated in Fig. 4,

a series of these rings 4: are suspended from the mold body; and when in this position the longitudinal rods 2 may be readily threaded completed and suspended in the mold cavity,

as above described, the plastic material may be poured through the opening. 15 into said cavity, and when said reinforcing structure is sufficiently embedded in said material the supports 10 are removed and the pile finished off in the usual manner. After the material has set, the mold 16 may be readily flattened out, as indicated in Fig. 2, and the finished pile removed.

It will thusbe observed that by the method disclosed I am enabled to make the individual rings 4 at any time and place desired, to store them or to even ship'them -in bulk to the place of use. The same remarks are true of the rods 2. It is further evident that these rods and rings may be readily and times its lower end 13, to project slightly.

beyond the concrete portion, as illustrated.

The special advantage of making a pile according to my method resides in the fact that the members of the reinforcing structure may be made at any time and place,

may be conveniently stored, and may be shipped in bulk to the place of use. An additional and very material advantage also resides in the fact that in assembling the parts of the reinforcing structure in the mold cavity the said parts may be handled one at a time, and readily assembled to give any desired strength by a very few persons.

-1 thus avoid the expensiveand tedious operationof building a long, heavy and cumbersome reinforcing structure, which is next to impossible to handle conveniently and cheaply, and which is also very expensive to properly mount in the mold cavity.

It is obvious that changes in the details of construction, in the arrangement of parts, and in the steps constituting my method may be made by those skilled in the art without departing from the spirit of my invention,

and therefore I do not Wish to be limited to such features except as may be required by the claims.

I am familiar with English Patent #19403 of 1905, and make no claim herein to the construction disclosed in said patent. It will be observed, however, that the ring disclosed in said English patent, is projected from its reinforcing radial arm and from a point on the circumference-of the circle lo cated between two of the horizontal reinforcing rods corresponding to those marked 2 in my Fig. 4, or to the pins marked 8 in my Fig. 3. In my invention, however, the wire forming the radial reinforcing arms 6 shown in my Fig. 3, is led directly from the piece 8, and therefore the said wire is efficiently supported, and any cheap labor is sufiiciently skilled to radially form the rings with their supporting arms complete. In other words, as above intimated, it is of the utmost importance in work of this kind, to be able to employ exceedingly cheap labor on the spot where the piles are to be driven; and as the making of 'my rings does not involve any difiicnlties' they can of necessity be made very easily and quickly.

What I claim is A, reinforced concrete pile comprising a body portion having embedded therein a plurality of independent reinforcing ring shaped members each made from a single piece of wire provided with eyes 5, and radial portions 6, projected from and formed by bending said wire into loops at ap-llb' rality of said eyes, said radial portions also extending from said eyes to the center of the ring portion; and longitudinal reinforcing rods threaded through said eyes, substantially as described.

In testimony whereof, I aflix my signature, in presence of two witnesses. I STEPHEN FRONTIS BURBANK. Witnesses:

FRED LU'soN, S. A. ANTHONY." 

